@[email protected]M to [email protected]English • 7 months agoTwo Imperial German sound locators for detecting airplanes, WW1, 1917lemmy.worldimagemessage-square19fedilinkarrow-up1247arrow-down12
arrow-up1245arrow-down1imageTwo Imperial German sound locators for detecting airplanes, WW1, 1917lemmy.world@[email protected]M to [email protected]English • 7 months agomessage-square19fedilink
minus-square@[email protected]linkfedilinkEnglish9•7 months agoBefore radar was invented, we pointed lights at the sky hoping to see enemy airplanes.
Before radar was invented, we pointed lights at the sky hoping to see enemy airplanes.
And after too, since radar is light.